Influence Of Ce On Microstructure And Properties Of Aluminum Bronze Alloy Powder And Coating

The novel kind of aluminum bronze alloy (Cu-14A1-X) powders was produced by water-atomization technology in the present test. The main composition of aluminum bronze alloy powders is Cu70～80%,Al12～16%,Fe2.0～4.0%. Other alloying elements is Mn, Ni,Co,Ce etc. Surface morphology, microstructural characteristics, microhardness and properties of aluminum bronze alloy powder was studies and tested. The influence of Ce on microstructure and properties of the aluminum bronze powders was discussed. The results shown that rare earth element Ce can improve the surface morphology of aluminum bronze alloy powders, increase the particles sphericity, refines grain, improve the microhardness and bulk density and mobility.Aluminum bronze alloy powder was coated on 45# steel by the plasma spray welding technology. Surface microstructure,phase structure,interface organization and hardness of aluminum bronze alloy powder coating was studied and tested by optical microscope, X-ray diffraction, electron probe micro-analysis (EPMA), scanning electronmicroscopy(SEM), energy dispersive spectrometer (EDS) and hardness. Effect of Ce on microstructure and hardness of the aluminum bronze coating was discussed. The results shown that aluminum bronze alloy powder coating were composed by Cu9Al4,AlFe3,AlFe,Fe3Mn7.Element Ce does no affect the phase composition of aluminum bronze alloy powder coating. It promotes hard phase (K phase) formation in the coating, improves k-phase morphology, distributes K-phase, decreases the grain size of organization, purifies the grain boundary, reduces other elements accumulation, increases the bonding strength and hardness of coating.